Обзор на русском + видео демонстрация тут https://www.youtube.com/watch?v=Wr_9nWZrMds
I don't like that it does not have delimiter and baby can push it to the mouth too far. It is not convenient to hold this brush in tiny child's hand and bristles are too thick.

have bought lots of these over the past year-odd and some batches work great, others get frazzled out after only two or three brushes
currently though the quality has been consistent (for the past six months) so hope that keeps up